<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--table作用-->
<!--<table border="1">
    <tr>
        <th>ID</th>
        <th>name</th>
        <th>PASSWORD</th>
    </tr>
    <tr>
        <th>1</th>
        <th>user1</th>
        <th>password1</th>
    </tr>
</table>-->
<!--正常编写HTML内容是通过快速标签签名 -->
<table border="1" >
    <tr >
        <td rowspan="2">tr1-td1</td>
        <td>tr1-td2</td>
        <td colspan="2">tr1-td3</td>
<!--        <td>td1-td4</td>-->
    </tr>
    <tr>
<!--        <td>1</td>-->
        <td>2</td>
        <td>3</td>
        <td>4</td>
    </tr>
    <tr>
        <td>1</td>
        <td>23</td>
        <td colspan="2" rowspan="2">3</td>
<!--        <td>4</td>-->
    </tr>
    <tr>
        <td>3</td>
        <td>2</td>
<!--        <td colspan="2">2</td>-->
<!--        <td>3</td>-->
    </tr>
</table>
</body>
</html>